Re: 89 W126 300SE cooling problems
- From: Rob. Smith <r.smith@xxxxxxxxxxx>
- Date: Mon, 07 Aug 2006 22:18:00 +0100
Hello Tom
Right on the ball as always. I'd forgot about the cap.
The fifth element!
To check this out (and not having a new cap to hand), I have firstly
cleaned the cap (inc the small reverse pressure release in the
centre). I have now pressurised the system cold with a foot pump into
the overflow line (through the pressure release valve in the cap,
which is on). There is definitely pressure in there now (I can feel it
in the rad hoses). I've left it some minutes and it seems to be
holding. How long is necessary is up for debate.
Assuming it holds the pressure tho (for some tens of minutes), does
that tell me anything with the thing cold. How different would it all
be hot (and I am considering that hot with these things is not a huge
heat (~100C).
As to the aux fan, I don't have one of those. Just the engine driven
one, and the viscous coupling feels quite stiff to me, so I surmise
that is OK.
You're right about the temps tho. Even for Blitey, we've had some
cracking hot weather. Nothing upto USA standards, but almost 100f in
places here. The humidity is pretty high though, which is wilting us
all.
I gotta say though, my Toyota Hilux (4-runner) diesel and my GM
runabout never gave me the slightest cause for concern in the heat.
My classic car buddy at work is convinced its the rad that is blocked.
Maybe the leak stopper I put in has finally bunged it up.
What do you think. A new rad for good measure?. I could maybe get a
re-core for $150 and all new for $200.
The pump is a definite candidate for swapping. There is definitely
some slight vertical play in the bearing. The pump will cost me $150
also.
Cheers... Rob.
"T.G. Lambach" <tlambach@xxxxxxxxxxxxxxxxxxxxxx> wrote:
Rob my Man,
How about starting with a new radiator cap?
That should hold the pressure.
Then I'd check why the fan and aux electric fan isn't effective.
Leaks aside, radiator is OK if no heating at speed.
But be forgiving, this old car isn't used to such high ambient temps!
Tom
.
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